Diagnostic Module Matching via Line ID Encryption
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Solution Overview
Problem
Existing automotive production line systems face challenges in accurately matching diagnostic modules with measurement modules due to overlapping radiofrequency communication links, leading to incorrect message reception and processing of information messages.
Innovation Solution
A method is introduced where the diagnostic module sends a request message with its identifier, and the measurement module generates a response message that is encrypted using the assembly line identifier as a key, ensuring secure data transmission and correct association, without modifying existing message formats or adding additional fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If response messages are transmitted on radiofrequency communication links to reduce costs and energy consumption, then communication efficiency improves, but message reception reliability deteriorates due to overlapping signals from multiple diagnostic modules
Solution Approach 1:
The patent introduces an intermediary identification mechanism (unique identifier field) that mediates between multiple diagnostic modules and measurement modules. This identifier acts as a mediator to distinguish messages from different sources, allowing reliable communication over radiofrequency links without requiring complex signal separation infrastructure.
Solution Approach 2:
The patent changes the parameter of message structure by adding a unique identifier field to response messages. This parameter change enables the system to handle overlapping radiofrequency signals reliably, as each message can be uniquely identified and routed to the correct diagnostic module despite transmission overlaps.
2Reliability
If diagnostic modules use low-frequency communication links to ensure directional signal verification and prevent incorrect message reception, then message reception reliability improves, but energy consumption and maintenance costs increase
Solution Approach 1:
The patent changes the communication parameter from low-frequency to radiofrequency links, compensating for the lower reliability of RF by implementing message structure modifications (unique identifiers) that enable reliable identification and routing of messages despite the less controlled propagation characteristics of RF signals.
3Reliability
If message formats are modified to include additional identification fields to prevent misinterpretation, then communication reliability improves, but device complexity and implementation costs increase
Solution Approach 1:
The patent segments the message structure by separating the unique identifier field from the payload data. This segmentation allows the identifier to be processed independently for routing and matching purposes, while the rest of the message maintains its original format, thereby minimizing the impact on overall system complexity.
Solution Approach 2:
The patent uses a simple copying mechanism where the unique identifier from the request message is echoed in the response message. This copying approach ensures reliable matching between requests and responses without requiring complex message format changes or additional processing logic.
4Ease of manufacture
If existing message formats are maintained without modification to reduce implementation costs, then ease of manufacture improves, but matching accuracy between diagnostic and measurement modules deteriorates
Solution Approach 1:
The patent applies partial modification to the message format by adding only the essential unique identifier field while leaving the rest of the message structure unchanged. This partial action approach achieves the necessary matching accuracy improvement without requiring complete message format redesign, thereby balancing implementation cost with performance improvement.
Data Source
AI summary
A method for associating a diagnostic module of an assembly line for assembling automotive vehicle wheels with a measurement module fitted in a wheel assembled on the assembly line. The method includes a step of encryption, by using the identifier of an assembly line as an encryption key, of at least one part of the response message and a step of decryption of the encrypted response message by using the identifier of its assembly line as a decryption key in such a way as to ensure that the measurement module is associated with the assembly line.